Abney, a new surname for me

just within the past few days I have discovered who my Thomas Spragins of Halifax co. Va. was married too. I have known for several years that her first name was Maacah and that was a much as I knew. now I know that her last name was said to be Abney. I know nothing about the origins of this name, etc.. Elizabth Spragins( known as the widow Gallaway) and daughter of above thomas and Maacah, married Joseph S. Gentry in Rockingham co. N.C. on Jan. 4, 1802. for years I had no idea who "The Widow Gallaway"belonged too.. Thomas and Maacah spraggins would be my gr.gr.gr.gr.gr.grandparents.thanks, any help and guidance would be appreciated.. Cal.